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  • 1980-1984  (6)
  • 1945-1949  (20,881)
  • 1925-1929
  • 1946  (20,881)
Collection
Language
Years
Year
  • 1
    Monograph available for loan
    Monograph available for loan
    Leipzig : SWA-Verl
    Call number: MOP 23009
    Type of Medium: Monograph available for loan
    Pages: 169 S. , Ill.
    Uniform Title: Vose'msotdvenadcat' dnej vo l'dach Arktiki
    Language: German
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Lindenberg : AOL
    Associated volumes
    Call number: MOP 43788(1) / Mitte
    In: Die Reichweite von Großscheinwerfern in Bezug auf Luftziele
    Type of Medium: Monograph available for loan
    Pages: 66 S.
    Series Statement: Die Reichweite von Großscheinwerfern in Bezug auf Luftziele 1
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 3
    Monograph available for loan
    Monograph available for loan
    Oslo : Cammermeyer in Komm
    Associated volumes
    Call number: MOP 21680
    In: On the frontogenesis and cyclogenesis in the atmosphere
    In: Geofysiske publikasjoner
    Type of Medium: Monograph available for loan
    Pages: 28 S. : Ill.
    Series Statement: On the frontogenesis and cyclogenesis in the atmosphere 1
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 4
    Monograph available for loan
    Monograph available for loan
    Reading : Soc. ; 1.1946 -
    Call number: MOP Per 137
    Type of Medium: Monograph available for loan
    ISSN: 0043-1656
    Note: Internetausg. ---〉 Weather , Erscheinungsjahr in Vorlageform:1946-
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 5
    Journal available for loan
    Journal available for loan
    Associated volumes
    Call number: Z 92.0096/15-17
    In: Chemie der Erde
    Type of Medium: Journal available for loan
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 6
    Monograph available for loan
    Monograph available for loan
    Dresden ; 1946-1948
    Call number: MOP Per 222/A
    Type of Medium: Monograph available for loan
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 7
    Monograph available for loan
    Monograph available for loan
    Stockholm : [Centraltr.]
    Associated volumes
    Call number: MOP Per 216/B(2) ; MOP 16024c
    In: Meddelanden
    Type of Medium: Monograph available for loan
    Pages: 6 S.
    Series Statement: Meddelanden / Sveriges Meteorologiska och Hydrologiska Institut 2
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 8
    Call number: MOP Per 155(50)
    In: Mededelingen en verhandelingen
    Type of Medium: Monograph available for loan
    Pages: 43 S.
    Series Statement: Mededelingen en verhandelingen / Koninklijk Nederlands Meteorologisch Instituut 50
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 9
    Call number: MOP Per 155(51)
    In: Mededelingen en verhandelingen
    In: Koninklijk Nederlands Meteorologisch Instituut
    Type of Medium: Monograph available for loan
    Pages: 143 S. : graph. Darst.
    Series Statement: Mededelingen en verhandelingen / Koninklijk Nederlands Meteorologisch Instituut 51
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 10
    Monograph available for loan
    Monograph available for loan
    's-Gravenhage : Rijksuitgeverij
    Call number: MOP 16011
    Type of Medium: Monograph available for loan
    Pages: 23 S.
    Series Statement: Mededeelingen en verhandelingen / Koninklijk Nederlandsch Meteorologisch Instituut 〈de Bilt〉 : Serie B 1,2
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 11
    Monograph available for loan
    Monograph available for loan
    's-Gravenhage : Rijksuitgeverij [in Komm.]
    Call number: MOP 16011
    Type of Medium: Monograph available for loan
    Pages: 103 S.
    Series Statement: Mededeelingen en verhandelingen / Koninklijk Nederlandsch Meteorologisch Instituut 〈de Bilt〉 : Serie B 1,1
    Note: Zugl.: Utrecht, Univ., Diss., 1946
    Location: MOP - must be ordered
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  • 12
    Monograph available for loan
    Monograph available for loan
    Moskva
    Call number: MOP Per 745
    Type of Medium: Monograph available for loan
    ISSN: 0372-5758
    Series Statement: Naucnye sborniki Moskovskogo Filiala Geograficeskogo Obscestva Sojuza SSR
    Note: In kyrill. Schr.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 13
    Monograph available for loan
    Monograph available for loan
    Stockholm
    Call number: MOP Per 216/B
    Type of Medium: Monograph available for loan
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 14
    Monograph available for loan
    Monograph available for loan
    Tananarive
    Associated volumes
    Call number: MOP Per 111/C(7)
    In: Publications du Service météorologique de Madagascar
    Type of Medium: Monograph available for loan
    Pages: 33 S. , 4 Beil.
    Series Statement: Publications du Service météorologique de Madagascar 7
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 15
    Monograph available for loan
    Monograph available for loan
    's-Gravenhage [u.a.]
    Call number: MOP Per 155
    Type of Medium: Monograph available for loan
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 16
    Monograph available for loan
    Monograph available for loan
    Oslo : Cammermeyer i komm.
    Call number: MOP Per 27
    Type of Medium: Monograph available for loan
    ISSN: 0072-1174
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 17
    Monograph available for loan
    Monograph available for loan
    Moskva : Izdat. Glavsevmorputi
    Call number: AWI G3-94-0117
    Type of Medium: Monograph available for loan
    Pages: 148 S. : graph. Darst.
    Series Statement: Polyarnaya Biblioteka
    Branch Library: AWI Library
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  • 18
    Monograph available for loan
    Monograph available for loan
    Berlin : Georg Siemens Publishing House
    Associated volumes
    Call number: MOP 15543
    In: Siemens' Technisches Taschenwörterbuch
    Type of Medium: Monograph available for loan
    Pages: 220, 248 S.
    Series Statement: Siemens' Technisches Taschenwörterbuch 2
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 19
    Journal available for loan
    Journal available for loan
    Tübingen : Mohr Siebeck ; 1.1884 - 48.1931; N.F. 1.1932/33 - 10.1943/44(1945),3; 11.1948/49(1949) -
    Call number: ZS 22.95039
    Type of Medium: Journal available for loan
    Pages: Online-Ressource
    ISSN: 1614-0974 , 0015-2218 , 0015-2218
    Language: German , English
    Note: N.F. entfällt ab 57.2000. - Volltext auch als Teil einer Datenbank verfügbar , Ersch. ab 2000 in engl. Sprache mit dt. Hauptsacht.
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  • 20
    Series available for loan
    Series available for loan
    Ottawa : Geological Survey of Canada
    Associated volumes
    Call number: SR 90.0007(6)
    In: Bulletin
    Type of Medium: Series available for loan
    Pages: V, 28 S. + 1 pl.
    Series Statement: Bulletin / Geological Survey of Canada 6
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 21
    Series available for loan
    Series available for loan
    Ottawa : Geological Survey of Canada
    Associated volumes
    Call number: SR 90.0007(7)
    In: Bulletin
    Type of Medium: Series available for loan
    Pages: V, 20 S.
    Series Statement: Bulletin / Geological Survey of Canada 7
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 22
    Series available for loan
    Series available for loan
    Ottawa : Geological Survey of Canada
    Associated volumes
    Call number: SR 90.0007(3)
    In: Bulletin
    Type of Medium: Series available for loan
    Pages: V, 77 S.
    Series Statement: Bulletin / Geological Survey of Canada 3
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 23
    Series available for loan
    Series available for loan
    Ottawa : Geological Survey of Canada
    Associated volumes
    Call number: SR 90.0007(5)
    In: Bulletin
    Type of Medium: Series available for loan
    Pages: V, 46 S.
    Series Statement: Bulletin / Geological Survey of Canada 5
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 24
    Series available for loan
    Series available for loan
    Ottawa : Geological Survey of Canada
    Associated volumes
    Call number: SR 90.0007(8)
    In: Bulletin
    Type of Medium: Series available for loan
    Pages: V, 149 S.
    Series Statement: Bulletin / Geological Survey of Canada 8
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 25
    Series available for loan
    Series available for loan
    Ottawa : Geological Survey of Canada
    Associated volumes
    Call number: SR 90.0007(4)
    In: Bulletin
    Type of Medium: Series available for loan
    Pages: V, 61 S.
    Series Statement: Bulletin / Geological Survey of Canada 4
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 26
    Monograph available for loan
    Monograph available for loan
    Berlin : Akademie-Verl. ; 1.1946/47,Okt. - 41.1991
    Call number: MOP Per 150
    Type of Medium: Monograph available for loan
    ISSN: 0084-5361
    Parallel Title: Daraus hervorgeg. ---〉 [Monatlicher Witterungsbericht für die Sowjetische Besatzungszone Deutschlands einschl. Berlins / 1]
    Parallel Title: Beil. ---〉 Meteorologischer und Hydrologischer Dienst der Deutschen Demokratischen Republik 〈Potsdam〉 / Zentralbibliothek: Neuerwerbungen der Zentralbibliothek des Meteorologischen und Hydrologischen Dienstes der Deutschen Demokratischen Republik im Hauptobservatorium Potsdam
    Parallel Title: Beil. ---〉 Angewandte Meteorologie
    Former Title: Vorg. ---〉 Meteorologische Zeitschrift
    Subsequent Title: Forts. ---〉 Meteorologische Zeitschrift, N. F.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 27
    Call number: MOP Per 38(21)
    In: Mémoires
    Type of Medium: Monograph available for loan
    Series Statement: Mémoires / Institut Royal Météorologique de Belgique 21
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 28
    Monograph available for loan
    Monograph available for loan
    Bruxelles : L'Avenir
    Associated volumes
    Call number: MOP Per 38(23)
    In: Mémoires
    Type of Medium: Monograph available for loan
    Pages: 24 S.
    Series Statement: Mémoires / Institut Royal Météorologique de Belgique 23
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 29
    Call number: MOP Per 27(16,12) ; MOP 21687
    In: Geofysiske publikasjoner
    Type of Medium: Monograph available for loan
    Pages: 44 S.
    Series Statement: Geofysiske publikasjoner 16,12
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 30
    Monograph available for loan
    Monograph available for loan
    Stuttgart : Borntraeger ; 1(1884) - 2(1885); 3=21(1886) - 54=72(1937); 55(1938) - 61(1944); 1(1992) -
    Call number: MOP Per 150
    Type of Medium: Monograph available for loan
    ISSN: 0369-1845 , 0941-2948
    Parallel Title: Darin aufgeg.: Österreichische Gesellschaft für Meteorologie: Zeitschrift der Österreichischen Gesellschaft für Meteorologie in Wien
    Parallel Title: Darin aufgeg. ---〉 Contributions to atmospheric physics
    Parallel Title: 1.1946/47,Okt. - 41.1991 ---〉 Zeitschrift für Meteorologie
    Parallel Title: 1.1947/48 - 44.1991 ---〉 Meteorologische Rundschau
    Parallel Title: 1930 Beil. ---〉 Deutsche Meteorologische Gesellschaft: Mitgliederverzeichnis der Deutschen Meteorologischen Gesellschaft
    Parallel Title: 1.1992 - 9.2000 ---〉 Meteorologische Zeitschrift, N. F.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 31
    Monograph available for loan
    Monograph available for loan
    Moskva [u.a.] : Izdat. Akad. Nauk SSSR
    Call number: MOP 20612
    Type of Medium: Monograph available for loan
    Pages: 446 S. + 13 Kt.
    Series Statement: Trudy Archiva / Akademija Nauk SSSR 6
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 32
    Call number: MOP 18335
    Type of Medium: Monograph available for loan
    Pages: 32 S.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 33
    Call number: MOP Per 27(16,5)
    In: Geofysiske publikasjoner
    Type of Medium: Monograph available for loan
    Series Statement: Geofysiske publikasjoner 16,5
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 34
    Call number: MOP Per 27(16,10) ; MOP 21685
    In: Geofysiske publikasjoner
    Type of Medium: Monograph available for loan
    Pages: 44 S. : Ill.
    Series Statement: Geofysiske publikasjoner 16,10
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 35
    Call number: MOP Per 27(16,9) ; MOP 21684
    In: Geofysiske publikasjoner
    Type of Medium: Monograph available for loan
    Series Statement: Geofysiske publikasjoner 16,9
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 36
    Call number: MOP 20832
    Type of Medium: Monograph available for loan
    Pages: 102 S.
    Language: Russian
    Note: In kyrill. Schr.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 37
    Monograph available for loan
    Monograph available for loan
    [Edgecumbe, N.Z.] : A. Muller
    Call number: M 15.89146
    Description / Table of Contents: An account of the results of the 2 March 1987 earthquake in the eastern Bay of Plenty and the aftermath's effects on the people and places on the Rangitaiki Plains
    Type of Medium: Monograph available for loan
    Pages: 223 S., , Ill.
    Language: English
    Branch Library: GFZ Library
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  • 38
    Call number: AWI G2-18-91730
    In: Revista del Museo de La Plata. Nueva Serie; T. 4, Sección Geología
    Type of Medium: Monograph available for loan
    Pages: S. 125-178
    Language: Spanish
    Note: In span. Sprache
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 39
    Monograph available for loan
    Monograph available for loan
    Berlin : Dt. Zentralverl.
    Call number: MOP 14165/2
    Type of Medium: Monograph available for loan
    Pages: 71 S.
    Edition: 5. Aufl.
    Series Statement: Anleitung zur Bestimmung und Bekämpfung der wichtigsten Schädigungen der Kulturpflanzen 2
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 40
    Call number: MOP 14467
    Type of Medium: Monograph available for loan
    Pages: 300 S.
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 41
    Monograph available for loan
    Monograph available for loan
    Berlin : Dt. Zentralverl.
    Call number: MOP 14165
    Type of Medium: Monograph available for loan
    Pages: 63 S.
    Edition: 7. Aufl.
    Series Statement: Anleitung zur Bestimmung und Bekämpfung der wichtigsten Schädigungen der Kulturpflanzen 1
    Location: MOP - must be ordered
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  • 42
    Call number: MOP Per 3
    Type of Medium: Monograph available for loan
    ISSN: 0369-0822
    Location: MOP - must be ordered
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  • 43
    Call number: MOP 22713
    In: Suomen Valtion Meteorologisen Keskuslaitoksen toimituksia
    Type of Medium: Monograph available for loan
    Pages: 39 S.
    Series Statement: Suomen Valtion Meteorologisen Keskuslaitoksen toimituksia 27
    Note: Zugl.: Helsinki, Diss
    Location: MOP - must be ordered
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  • 44
    Monograph available for loan
    Monograph available for loan
    Bruxelles : Inst. Roy. Mét. de Belgique
    Associated volumes
    Call number: MOP Per 290(24) ; MOP 15071(g)
    In: Miscellanées
    Type of Medium: Monograph available for loan
    Pages: 19 S. , Ill.
    Series Statement: Miscellanées / Institut Royal Météorologique de Belgique 24
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 45
    Call number: MOP Einzelsignatur
    Type of Medium: Monograph available for loan
    ISSN: 1059-5600
    Location: MOP - must be ordered
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  • 46
    facet.materialart.
    Unknown
    London : Her Majesty's Stationary Office
    Call number: Per 343
    ISSN: 0072-6613
    Branch Library: GFZ Library
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  • 47
    Monograph available for loan
    Monograph available for loan
    Helsinki
    Associated volumes
    Call number: MOP 15077b
    In: Ilmatieteellisen Keskuslaitoksen toimituksia
    Type of Medium: Monograph available for loan
    Pages: 25 S.
    Series Statement: Ilmatieteellisen Keskuslaitoksen toimituksia 28
    Location: MOP - must be ordered
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  • 48
    Call number: MOP 17445
    In: Publication
    Type of Medium: Monograph available for loan
    Pages: 217 S.
    Series Statement: Publication / Organisation Météorologique Internationale 51
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 49
    Monograph available for loan
    Monograph available for loan
    Washington, DC : US Gov. Print. Off. ; 1.1872 - 882.1971
    Call number: MOP Per 310
    Type of Medium: Monograph available for loan
    ISSN: 0041-8021
    Subsequent Title: Forts. ---〉 USA / Patent Office : [Official gazette of the United States Patent Office / Patents]
    Subsequent Title: Forts. ---〉 USA / Patent Office : [Official gazette of the United States Patent Office / Trademarks]
    Location: MOP - must be ordered
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  • 50
    Call number: MOP A3 31287
    Type of Medium: Monograph available for loan
    Pages: 69 Kt.
    Location: MOP - must be ordered
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  • 51
    facet.materialart.
    Unknown
    Wien : [Verlag nicht ermittelbar] ; 22.1910/25(1925),3; 23.1914/31(1929/31),2-3; 24.1927,1-2; 25.1939,1; 26.1948,1; 27.1971-Band 76 (2022)
    Call number: S 91.1179
    ISSN: 0375-5797 , 0378-0864
    Parallel Title: 35=2 von European Conodont Symposium (ZDB) Guidebook, abstracts / European Conodont Symposium
    Parallel Title: 41=2 von Workshop on Agglutinated Foraminifera (ZDB) Proceedings / Workshop on Agglutinated Foraminifera. Geologische Bundesanstalt
    Parallel Title: 39=3 von International Nannoplankton Association Proceedings of the ... International Nannoplankton Association conference
    Parallel Title: 60=11 von Deutsche Gesellschaft für Geowissenschaften. Fachsektion GeoTop Internationale Jahrestagung der Fachsektion GeoTop der Deutschen Gesellschaft für Geowissenschaften
    Former Title: Vorg. Geologische Reichsanstalt Abhandlungen der Kaiserlich-Königlichen Geologischen Reichsanstalt, Wien
    Subsequent Title: Fortgesetzt durch Abhandlungen
    Language: German
    Branch Library: GFZ Library
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  • 52
    Call number: MOP Per 290(23)
    In: Miscellanées
    Type of Medium: Monograph available for loan
    Pages: 18 S.
    Series Statement: Miscellanées / Institut Royal Météorologique de Belgique 23
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 53
    Call number: MOP Per 198
    Type of Medium: Monograph available for loan
    ISSN: 0367-2794
    Parallel Title: Beil. ---〉 Reichszentrale für Wissenschaftliche Berichterstattung 〈Berlin〉: Kurznachrichten / Reichszentrale für Wissenschaftliche Berichterstattung
    Location: MOP - must be ordered
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  • 54
    Call number: MOP Per 290(22) ; MOP 15071f
    In: Miscellanées
    Type of Medium: Monograph available for loan
    Pages: 32 S.
    Series Statement: Miscellanées / Institut Royal Météorologique de Belgique 22
    Location: MOP - must be ordered
    Location: MOP - must be ordered
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    Branch Library: GFZ Library
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  • 55
    Monograph available for loan
    Monograph available for loan
    Bruxelles
    Associated volumes
    Call number: MOP Per 290(25) ; MOP 15426 ; MOP 15071h
    In: Miscellanées
    Type of Medium: Monograph available for loan
    Pages: 35 S.
    Series Statement: Miscellanées / Institut Royal Météorologique de Belgique 25
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 56
    Monograph available for loan
    Monograph available for loan
    New York [u.a.] : McGraw-Hill
    Call number: MOP 16777
    Type of Medium: Monograph available for loan
    Pages: Getr. Zählung. : Ill., zahlr. graph. Darst. , [887 pages]
    Edition: 2. ed.
    Note: Chapter I INTRODUCTION 1. Location of Objects 2. Radio Means of Locating Objects 3. Definition of Radar A. DETECTION BY RADIO ECHOES 4. Frequency-Modulation Systems 5. Frequency-Shift Systems 6. Pulse Systems 7. Types of Data Presentation 8. Pulse Shape, Duration, and Repetition Frequency; Peak and Average Power B. OBJECTS 9. Aircraft as Objects 10. Ships as Objects 11. Land and Coastal Objects 12. Projectiles as Objects C. DETERMINATION OF DIRECTION AND RANGE 13. Determination of Range 14. Determination of Direction D. RECOGNIZING THE CHARACTERS OF OBJECTS E. EMPLOYING THE DATA Chapter II TIMING CIRCUITS A. CLIPPING CIRCUITS 1. Clipping wlth Diodes 2. Clipping with Amplifiers 3. Clipping with Cathode Followers B. R-C CIRCUITS 4. Transients in R-C Circuits 5. Saw-Tooth Generator 6. Decoupling Filters and Bias Circuits 7. R-C Peaker 8. Sloping Wavefront Applied to Peaker 9. R-C Coupling Circuits 10. Signal Bias and Clampers 11. Effect of Grid Return 12. Tube and Wiring Capacitances 13. Free-Running Plate-Coupled Multivibrator 14. Driven Plate-Coupled Multivibrator 15. Cathode-Coupled Multivibrator 16. Phantastron Delay Circuit C. R-L-C CIRCUITS 17. Transients in Parallel R-L-C Circuits 18. Ringing Circuit 19. Pulse Transformer 20. Blocking Oscillator 21. Traveling Waves on Artificial Transmission Lines 22. Reflections at Line Terminals 23. Applications of Artificial Transmission Lines Chapter III INDICATORS A. CATHODE-RAY TUBES 1. Electrostatic Cathode-Ray Tubes 2. Magnetic Cathode-Ray Tubes 3. Designations and Ratings of Cathode-Ray Tubes B. SWEEP-VOLTAGE CIRCUITS 4. Basic Type A Indicator Circuit 5. Methods of Improving the Linearity of Sweep Voltages 6. Phase-Inverter Circuits 7 Delayed Sweeps and Expanded Sweeps 8. Indicators Used with Lobe Switching 9. Type J Presentation C. SWEEP-CURRENT CIRCUITS 10. Range-Sweep Current from Initial Part of Exponential Rise 11. Range-Sweep Current from a Trapezoidal Voltage 12. R-C Trapezoidal-Voltage Generator 13. Feedback-Amplifier Sweep Circuit 14. Effect of Distributed Capacitance 15. Azimuth-Sweep Circuit for Type B Presentation 16. Requirements for Plan Position Indication 17. Rotating-Coil PPI 18. Electrical Azimuth Sweep for PPI Chapter IV RECEIVERS A. GENERAL CHARACTERISTICS OF RADAR RECEIVERS 1. Over-all Requirements and Limitations 2. Block Diagram B. RECEIVER NOISE 3. Nature of Noise 4. Sources of Noise 5. Receiver Input Stages 6. Receiver Noise Figure C. BANDWIDTH REQUIREMENTS 7 The Problem of Pulse Amplification 8 Analysis of Rectangular Pulses 9 Signal Frequencies in the Receiver 10 Bandwidth in Search-Type Systems 11 Bandwidth in FIre-Control Systems D. AMPLIFIERS 12. Equivalent Circuits 13. Symbols 14. Video Amplifiers 15. I-F Amplifiers 16. R-P Amplifiers E. MIXERS 17. Single-Input Mixers 18. Mixer Circuits 19. Crystal Mixers 20. Noise and Gain of Input Stages P. DETECTORS 21. Diode Detectors 22. Plate-Circuit Detectors G. LOCAL OSCILLATORS 23. Requirements 24. Triodes 25. Reflex Velocity-Modulated Tubes H. AUTOMATIC FREQUENCY CONTROL 26. The Discriminator 27. Utilization of Discriminator Output for Frequency Control J. OPERATION AND TESTING 28. Alignment 29. R-F Tuning Adjustments 30. Testing Chapter V MAGNETRONS 1. Motion of an Electron in an Electric Field Alone 2. Motion of an Electron in a Magnetic Field Alone 3. Motion of Electrons In Uniform, Mutually Perpendicular Electric and Magnetic Fields 4. Introduction to Magnetron Oscillators 5. Split-Anode Electron-Resonance Magnetron Oscillator, Plane Form 6. Multi-Anode Electron-Resonance Magnetron Oscillator, Cylindrical Form 7. Lumped-Constant Equivalent Circuit of Magnetron Tank Circuit 8. Characteristics of Magnetrons 9. Care of the Magnetron and Magnets 10. Checking the Proper Operation of the Magnetron Chapter VI MODULATORS A. PULSE FORMATION BY NETWORKS AND SWITCHES 1. Charging an Open-End Line 2. Pulse Formation by Discharge of an Open-End Line 3. Pulse Formation by a Shorted-End Line 4. Pulse-Forming Networks 5. Switching Devices for Discharging Pulse-Forming Networks B. LINE-PULSING MODULATORS 6. Charging Methods 7. Rotary-Spark-Gap Modulator 8. Modulator with Saturable-Core Reactor and Inductive-Impulse Charging C. DRIVER-POWER-AMPLIFIER MODULATORS 9. R-C-Coupled Power Amplifier 10. Transformer-Coupled Power Amplifier 11. Bootstrap Driver 12. Line-Controlled Blocking-Oscillator Driver 13. Delay-Line Controlled Driver 14. Driver Using Shorted-End Line 15. Saturable-Core-Reactor Driver 16. Blocking-Oscillator Modulator Chapter VII TRIODE TRANSMITTERS A. TRANSMITTER COMPONENTS 1. Tubes 2. Tuning Elements 3. Parasitic Suppressors 4. Power Supplies B. SINGLE-TUBE OSCILLATORS 5. Ultra-Audion Oscillator 6. Lighthouse-Tube Oscillator C. PUSH-PULL OSCILLATORS 7. Tuned-Plate Tuned-Grid Oscillator 8. Timed-Grid Tuned-Cathode Oscillator 9. Tuned-Plate Tuned-Grid Tuned-Cathode Oscillator D. RING OSCILLATORS 10. Tuned-Grid Tuned-Cathode Oscillator 11. Tuned-Plate Tuned-Cathode Oscillator 12. Tuned-Plate Tuned-Grid Tuned-Cathode Oscillator E. OUTPUT COUPLING 13. Direct Coupling 14. Balanced-to-Unbalanced Transformers 15. Coupling Loop as Resonant Transformer 16. Coupling Loop with Series Tuning 17. Coupling Loop with Parallel Tuning l6. Capacitive Coupling F. PULSING OF TRIODE OSCILLATORS 19 Grid-Leak Bias in Oscillators 20 Modulators for Triode Oscillators 21 Self-Pulsed Oscillators 22 Synchronization of Self-Pulsed Oscillators 23 Line-Controlled Self-Pulsed Oscillators 24 Tuning and Adjusting of Oscillators Chapter VIII RADIO-FREQUENCY LINES A. INTRODUCTION 1. Functions of Radio-Frequency Lines in Radar 2. Types of Radio-Frequency Lines 3. Losses 4. Open-Wire Lines 5. Coaxial Lines 6. Two-Conductor Shielded Cable 7. Hollow Wave Guides 8. Radio-Frequency Components B. THE LONG-LINE EQUATIONS 9. Distributed Constants 10. Representation of Steady-State Alternating Quantities by Complex Numbers 11. Notation 12. The Differential Equations and Their Solution 13. Interpretation of the Equations as Traveling Waves 14. Attenuation 15. Line with Negligible Losses 16. Characteristic Impedance 17. Reflection Coefficient 18. Vector Diagrams of Terminal Voltages fluid Currents 19. Standing Waves—Complete Reflection 20. Standing Waves--Partial Reflection 21. Standing-Wave Ratio 22. Practical Importance of Low Standing-Wave Ratio 23. Power 24. Efficiency 25. Impedance and Admittance 26. Impedance Circle Diagram 27. Examples of the Use of the Circle Diagram 28. Proof of the Circle Diagram 29. The Smith Chart C. IMPEDANCE MATCHING 30. Matching Requirements During Transmission 31. Types of Matching Devices 32. Methods of Matching an Antenna to the Characteristic Resistance of a Transmission Line 33. Methods of Matching a Transmission Line to a Transmitter 34. Matching Requirements During Reception 35. Prevention of Absorption of Received Power by Transmitter 36. Methods of Matching Receiver to Transmission Line 37. Effect of R-P Loading on Magnetrons 38. Practical Tuning Procedure 39. Fixed Versus Adjustable Matching D. R-F COMPONENTS OF TYPICAL RADAR SETS 40 Typical 100-Mcps Ground Set 41 Typical 500-Mcps Air-Borne Set 42 Typical 5000-Mcps Air-Borne Set 43 Constants of Coaxial and Open-Wire Lines 44 Some Coaxial-Line Accessories Chapter IX RADAR ANTENNAS AND PROPAGATION RADAR ANTENNAS 1. Reciprocity 2. Terms 3. The Half-Wave Antenna 4. Means of Exciting Half-Wave Antennas 5. Input Impedances of Center-Fed Antennas of Arbitrary Length 6. Adjustment of Antenna Impedance 7. Means of Supporting Half-Wave Antennas 8. The Quarter-Wave Antenna 9. Mechanism of Radiation from a Half-Wave Antenna 10. Fields Around a Half-Wave Antenna When the Radial Distance is Large 11. Polarization 12. Patterns of a Half-Wave Antenna; Pattern Interpretation 13. Vector Diagram for a Half-Wave Antenna 14. A Justifiable Approximation in Computing r 15. Sample Calculation Using Vector Diagram 16. A Principle of Vector Addition 17. Resultant Field of a Simple Array of Half-Wave Anten
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  • 57
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    Washington, D. C. : U. S. Dep. of Commerce
    Call number: MOP 17963
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  • 58
    Call number: MOP 17136
    In: Publication
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    Pages: 321 S.
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  • 59
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    Berlin [u.a.] : Urban & Schwarzenberg
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    Pages: 120 S.
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  • 60
    Call number: G 6642
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  • 61
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    Rio de Janeiro
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  • 62
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    Washington, DC : Smithsonian Inst. Press
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  • 63
    Call number: ZSP-553
    ISSN: 0025-6676
    Note: Urh. teils: Commissionen for Ledelsen af de Geologiske og Geographiske Undersøgelser i Grønland
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  • 64
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    Budapest
    Call number: MOP Per 378
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    ISSN: 0200-0083
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  • 65
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    Paris : Éd. de la Revue d'Opt. Théor. et Instrumentale
    Call number: 12567
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    Pages: VIII, 286 S.
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  • 66
    Call number: MOP 16024b ; MOP Per 216/B(3)
    In: Meddelanden
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    Pages: 13 S.
    Series Statement: Meddelanden / Sveriges Meteorologiska och Hydrologiska Institut B. 3
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  • 67
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    Potsdam
    Call number: MOP 18189
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  • 68
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    Potsdam
    Call number: MOP 18189
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    Pages: 10 Tafeln
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  • 69
    Call number: MOP 13687 ; MOP S 3806
    Type of Medium: Monograph available for loan
    Pages: 3 S. : Ill.
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  • 70
    Call number: MOP 15073 ; MOP Per 155(52)
    In: Mededelingen en verhandelingen
    In: Koninklijk Nederlands Meteorologisch Instituut
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    Pages: 6 S. : Ill.
    Series Statement: Mededelingen en verhandelingen / Koninklijk Nederlands Meteorologisch Instituut 52
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  • 71
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    Paris ; 1.1944/45 - 38.1982
    Call number: MOP Per 10
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    ISSN: 0003-4029
    Subsequent Title: Forts. ---〉 Annales geophysicae
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  • 72
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    Ottawa
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    Call number: SR 90.0925(15)
    In: Economic geology report
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    Pages: 86 S.
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    Language: English
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  • 73
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    Wien : Springer
    Call number: G 6316
    Type of Medium: Monograph available for loan
    Pages: VII, 209 S. : Ill
    Language: German
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  • 74
    Call number: MOP 41366 / Mitte
    Type of Medium: Monograph available for loan
    Pages: VIII, 210 Seiten , Illustrationen , 8°
    Edition: zweite, verbesserte Auflage
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    Berlin : Siemens
    Call number: MOP 21271
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    Pages: 345 S.
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  • 76
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    Heerbrugg : Wild
    Call number: O 2233
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    Washington, DC : Smithsonian Inst. Press
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    In: Publication
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    Riederau/Ammersee : American Bioclimatic Research Institute
    Call number: MOP 15044
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    Pages: 719, 714 S. : zahlr. Ill.
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  • 79
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    Washington, DC : Smithsonian Inst. Press
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  • 80
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    Uppsala : Gebers
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    Call number: O 2529
    In: Princeton mathematical series
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    Pages: XVI, 575 S.
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  • 81
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    Uppsala : Almquist & Wiksells
    Call number: O 2241
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    Pages: 256 S. : Ill.
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  • 82
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    's-Gravenhage [u.a.] : Rijksuitgeverij [in Komm.]
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    In: Mededelingen en verhandelingen
    In: Koninklijk Nederlands Meteorologisch Instituut
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    Moskva : Gidrometeoizd.
    Call number: MOP 23954
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    Berlin : de Gruyter
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    Moskva [u.a.] : Izdat. Akad. Nauk SSSR
    Call number: MOP 20722
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    Pages: 373 S. : Ill.
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  • 86
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    Lisboa : Papelaria Fernandes
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    Call number: MOP 15811(5)
    In: O clima de Portugal
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    Pages: 32 S. : Ill.
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  • 87
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    Helsingfors : Akad. Bokhandeln [u.a.]
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    Call number: MOP Sü 14249
    In: Mitteilungen des Meteorologischen Instituts der Universität Helsinki - Helsingfors
    In: Commentationes Physico-Mathematicae
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    Pages: 47 S. : graph. Darst., Kt.
    Series Statement: Mitteilungen des Meteorologischen Instituts der Universität Helsinki - Helsingfors 57
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  • 88
    facet.materialart.
    Unknown
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.94 (1946) nr.1 p.5
    Publication Date: 2015-05-08
    Description: As an introduction to a number of researches of his own the author wishes to give the following data: „Veen” has two meanings in Dutch: 1. in a petrographic sense (peat) Von Büllow’s definition was accepted: „Torf” ist zu deflnieren als ein meist dunkles, kohlenstoffreiches und ± saures Gemenge unvollständig spezifisch-zersetzter Pflanzenteile, das erdgeschichtlich jüngste Glied der Verwantschaftsreihe der Kohlen, dessen Bildung noch heute andauert.” 2. in a plant-sociological-geographic sense (bog) the following definition has been suggested: a bog is a plot, the surface of which consists of a layer of peat, either covered or not with vegetation, with which that layer is genetically connected. The classification of bogs according to their position with regard to the water-level of the surroundings (Staring) and that of the geological chart were rejected on account of their ambiguous character. The classification suggested by Van Baren according to the environment in which the bogs have been formed, was likewise thought insufficient. Preference was given to the classification according to the plants which gave rise to the peat (eutrophic, mesotrophic and oligotrophic bogs) and according to the origin of the water needed for peat formation (topogenous, ombrogenous and soligenous bogs). The conditions of peat-formation are of a botanical (presence of a vegetation and micro-organisms), climatologic (presence of a certain temperature and moisture) and geological nature (presence of a basin, valley or dead river-branch, certain level of ground water, a possible impervious layer). With reference to a number of authors (Picardt; Van Lier; Grisebach, Venema and Staring; Weber) the alteration in conception as to peatformation from the 17th via the 18th and 19th to the 20th century has been given. The word „Peel” cannot be derived from „palus”. Nothing is certain about its origin. It may mean the low land, bog or marsh. The bogs of the Peel lie on the Brabant-Limburg border-plateau (fig. 2). Lorié and Pannekoek van Rheden have shown that the peatformation of the Peel is likely to have occurred in channels, which have been formed by the Meuse, in co-operation with wind and rain (fig. 4). The bogs were therefore in the first instance topogenous formations, which afterwards developed into ombrogenous bogs. For his own research the author collected peat in three ways: 1. by cutting lumps of peat from open profiles; 2. by boring with a simple peat-bore (photograph 1); 3. by boring with the Utrecht peat-bore, an improvement on Dachnowski’s (fig. 5). To assist in the pollen-analytic examination the samples were treated according to Erdtman’s method. The latter has the following advantages compared with the usual treatment with a 10% KOH-solution: 1. the surface-structures of the pollen-grains are more distinct and as a result the grains themselves can be recognized better; 2. the pollen is more concentrated, so that in spite of the method taking up much time, a saving of time is possible. How the method is applied may be found in the chapter concerned (p. 38 and following). For the stratigraphic examination the samples were broken apart in a glass-bowl of water and viewed with a binocular microscope. Dry sandy samples were broken in water, when seeds and other vegetative parts came floating to the top; next they were put with a brush on thick blotting paper and studied through the binocular microscope. The designations for the sediments and species of peat have been derived from Fægri & Gams. For Scheuchzeria peat a new designation has been added. A plea was made for replacing the word pollen-analysis by „palynology”. A survey of the observations and examinations up to abt. 1935 closes the introduction (see the diagrams of Weber, Erdtman and Duyfjes in the figs. 6, 7, 8 and 9). The author’s own research refers to the Southern and Astense Peel, as in the remaining grounds of the geological chart indicated I 4v (= raised bog) no samples could be taken owing to the digging off having progressed too far. 10 profiles were examined. The situation of the bore-sites has been given in the geological chart of the grounds (fig. 3). The result of the examination (figs. 10—27) and the discussion on it may be summerized as follows: Zoning of pollen-diagrams The sub-zoning of the late- and post-glacial periods according to Blytt & Sernander has proved useful as a zoning of pollen-diagrams, provided atlantic and sub-boreal are joined. It is desirable to replace Blytt & Sernander’s terminology by a different one, because the authors gave a climatologic connotation to their names of periods. The limit between pleistocene and holocene was drawn between preboreal and boreal as Florschütz did. As phases of the holocene the following names were suggested: young post-glacial = sub-atlantic mid post-glacial = sub-boreal and atlantic old post-glacial = boreal. Neither in the Peel nor elsewhere in Holland have Allerød-deposits been found. They are not likely to be found either, as on account of the long distance from the land-ice-margin the flora will have been hardly or not at all influenced by the Allerød interstadial period. For Holland therefore the zoning of the late-glacial according to Firbas (1935) may be considered sufficient. The names of the periods do not bear a climatologic connotation as those of the post-glacial phases do. For the sake of a unity the following names have been suggested: young late-glacial = pre-boreal mid late-glacial = sub-arctic period old late-glacial = arctic period. Forest-history In a table (p. 98), in which likewise the Peel diagrams of Weber, Erdtman and Duyfjes have been inserted, the examined profiles have been arranged from North to South. From each profile it has been stated whether it originated in a certain period (+) or not (—). The sub-arctic phase was characterized by forests of Betula and Pinus and was followed by the pre-boreal phase, in which Corylus and Alnus occurred. Also from the other Dutch diagrams (see list on p. 99) it appeared that in the Netherlands the Alnus pollen occurs with an equal frequency before, during and after that of the Quercetum mixtum. The old post-glacial zone of the diagrams shows a peak in the Pinusline. In contrast with the from Mid-Europe there is not always a maximum in the Corylus-curve after the Pinus-peak. In other Dutch diagrams this phenomenon is likewise found. Only in 28% of all Dutch profiles with a boreal zone does a hazel-maximum succeed a Pinus one. They often co-incide (16%), while in the remaining cases no hazelpeak has been established. There is no fixed order of sequence in the occurrence of the components of the Quercetum mixtum, either in the Peel or elsewhere in Holland. The mid post-glacial is the phase of culmination of warmth-loving forest elements: Alnus pollen shows the highest percentage in this zone. Quercus pollen also occurs in great quantities, while Ulmus and Tilia take up an important place up to the „Grenzhorizont”. The absolute and empiric Fagus pollen limits are found at different heights in the mid post-glacial zone of the diagrams, the rational limit lies somewhere near the „Grenzhorizont”. In the young post-glacial phase the Fagus pollen attains fairly high percentages (up to 30%). The maxima in the East and South-east of the Netherlands are between 20% and 38%; they decrease towards the coast and increase towards the South-east (Hautes Fagnes, Belgium) and East (Germany). It seems incorrect to class the Netherlands almost entirely among the oak-alderterritory poor in beeches, as Firbas did. An attempt has been made to fit the Peel-diagrams into Overbeck & Schneider’s zonation system. For the territory for which it has been made there are already difficulties (p. 104), for use in the Peel and other Dutch diagrams there are even more objections (p. 68, 104). Godwin’s zonation system appeared to be a little less forced, but not quite useful on account of too many details. From his horizons that of Ulmus proved useless for the continent. Neither for the Peel nor for the Netherlands and its surrounding territory can a detailed zonation system be designed. It has proved difficult to proceed any farther than Rudolph’s „Grundsukzession”: birch, pine-hazel-mixed oak-forest-beech, in which the alder generally joins the mixed oak-forest and the hornbeam the beech. Before drawing far-reaching conclusions from the course of the curves (as has been done by some authors) more palynological researches are needed in accordance with the actuality principle, known from geology. Pollen-grains from warmth-loving trees in seemingly sub-arctic spectra In profile 4 (Deurnse Peel II) pollen-grains of Abies, Alnus, Picea, Tilia, Ulmus and Corylus were found in the „late-glacial” zone (figs. 14, 15). Investigations were made as to which of the following possibilities would be the cause of their appearance: 1. in taking and preparing the samples pollution occurred; 2. pollen-transport over long distances has taken place; 3. the pollen-grains found have got secondarily into the deposit; 4. warmth-loving trees have occurred in favourable circumstances in the late-glacial phase or 5. in an interstadial period or in an interglacial phase. The said pollen-grains probably hail from a Würm interstadial or interglacial phase. Interglacial peat On the site of the bore-point 7 it was possible to collect samples from the layers under the peat. The upper 40 cm of the diagram Griendtsveen IX (fig. 27) of this profile proved a repetition of the lower 40 cm of the Griendtsveen I profile (fig. 18). The diagram shows that pollen of Carpinus, Picea and Abies occurs showing the deposit to be of interglacial age. The pollen-curves, however, pass unnoticed from an interglacial into a post-glacial portion. The limit is likely to be found between the two, about 30 cm below the mowing field. There is therefore a great stratigraphic hiatus. Pollen-analytically it could not be decided from which interglacial period the profile hails; on account of its situation on the middle terrace, it was deemed likely that it was an Eem sea deposit. The examined profile probably corresponds to Jessen & Milthers’ zone g; showing it to have been formed at the end of the Eem sea period. The Meuse therefore cannot have flowed through this part of the Astense Peel after the mid Eemean phase. Stratigraphy This is difficult to summarize. Compare various profiles. Individual mention may be made here of: 1. peat on a podsol layer; this was found in two places (Deurnse Peel I Kraaienhut and Griendtsveen VIII). Peat-formation may be thought to have occurred in the following way: heather started growing on drift-sand giving rise to a podsol layer. As the latter is impervious the vegetation surface became marshy. The heath was replaced by a Caricetum from which peat arose. Gradually more Eriophorum occurred, from which almost pure vaginatum peat arose. The bog-surface grew moister and moister, Sphagnum cuspidatum and Scheuchzeria could grow on it and formed a „Vorlaufstorf”. Only then could non-extremehydrophile Sphagna join in peat-formation. 2. the occurrence of Scheuchzeria-peat after the „Grenzhorizont” period. This species of peat, which is often found at the basis of the old Sphagnum-peat as a mesotrophic transition vegetation, has for the Netherlands only been found in the young post-glacial phase in the Peel (Deurnse Peel I Kraaienhut, Griendtsveen V and VIII and Nederweerd). At present the plant is very rare. The severe decline of this plant was also observed elsewhere. Probably it is caused by the gradual drying up or reclaiming of the raised bogs. Of the present station of Scheuchzeria near Ommen a short description has been given (p. 59 and photographs 2, 3, 4). 3. the „Grenzhorizont”. Where the young Sphagnum-peat has not been dug for the preparation of moss-litter, the Peel bogs show a clear „Grenzhorizont” (photograph 8). The conceptions about its origin have been discussed. The distinct separation between the old and the young Sphagnum-peat was not considered sufficiently explained. Though on the whole the „Grenzhorizont” is synchronous in the North-west European profiles, the point of transition from old to young Sphagnumpeat was fairly unstable and easily changeable as to time. Generally the date of the „Grenzhorizont” is fixed at about 500 A.D., though there are differences in opinion. There is a lack of archeological correlation which renders a correct dating impossible. Interference of man in the Peel Three ways of interference were stated: 1. peat has been dug off for the greater part in the territory of the Peel: young Sphagnum-peat for the preparation of moss-litter, old Sphagnum-peat for fuel. The trees which appeared when the bog was dug up in the „Veenderij der Maatschappij Griendtsveen” are sometimes in so good a condition, that they are used for building sheds. The 1 st, 2nd and 4th beam in the foreground of the shed in photo 5 has been sawn from a 30 m long subfossil pine. 2. in a native peat-digging it was possible to collect recent young Sphagnum-peat. 40 to 50 years ago the peasants living there had dug peat in holes, which were afterwards left to themselves. Sphagnum started growing again and the holes were filled in again. The diagram (fig. Griendtsveen VII) represents the surrounding heath with scattered pines and birches, sown by the wind, and a pine-plantation close by. 3. in the profiles Nieuwe Peel, Griendtsveen VI and VII it has been fixed by the indications given by Firbas, that only in the surface layers of the bog has corn-pollen occurred. So in these parts cultivation of cereals will be of recent date. This also appeared from the history of the reclamation of the said territory.
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  • 89
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.10
    Publication Date: 2015-03-06
    Description: Most classifications of the genera of the Gramineae have been on the structure and arrangement of their spikelets, for these organs provide a far greater variety of readily distinguishing characters than do other parts of the grass plant. Nevertheless it has not always been possible to decide from morphological studies alone whether marked similarities in structure point to a close affinity or are merely examples of parallel development. The modern taxonomist, endeavouring to arrange the grass genera in as natural a sequence as possible in order to emphasise relationships and evolutionary trends, sooner or later meets with difficulties in this respect, for examples of parallelism are of common occurrence in this family. He is more fortunate, however, than his predecessors, in that his own intensive morphological studies, based on a wider range of specimens, may be supplemented by additional data gleaned from the ecological, anatomical and cytological researches of contemporary workers. Thus aided by the more complete information at his disposal, it has been possible for him to rearrange certain groups, particularly the Festuceae and Hordeeae, in which parallel development has occasionally led to unrelated genera such as Lolium, Agropyron and Nardus, being too closely associated. In the following account an attempt has been made to provide a more natural classification for about eighteen species frequently referred to the genus Lepturus R. Br. by reason of their similar spicate inflorescences.
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  • 90
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.25
    Publication Date: 2015-03-06
    Description: Urelytrum Henrardii Chippindall sp. nov.; ab U. agropyroidei Hack., cui e descriptione affine, culmis gracilibus, foliorum laminis non hirsutis, longe attenuatis, longioribus, racemis flavido-viridibus, spicularum sessilium gluma inferiore 5-nervi, arista breviore distinguendum — Fig. 1. Gramen perenne caespitosum, usque ad 92 cm altum. Culmi erecti, simplices, graciles, pauci-nodes, glabri, racemos versus asperuli. Folia plerumque basalia; vaginae internodiis longiores, sublaxae, striatae, apicem versus carinatae, basales glabrae laevesque, superiores pilis patulis laxe pilosae, ore villoso-barbatae; ligulae scariosae, rotundato-obtusae, 0.8—1.25 mm longae; laminae lineares, apice tenuiter setaceae, planae vel leviter conduplicatae, usque ad 38 cm longae, 3—3.8 mm latae, marginibus scabridis, costis asperulis, pone ligulam pilis longis exceptis glabrae. Racemi ad culmi apicem solitarii, stricti, fragiles, subcylindrici, fere glabri, flavidi vel pallide flavido-virides, saltem 16 cm longi; articuli rhacheos compressi, infimo usque ad 2 cm longo, scaberuli, margine uno superne rigide ciliati, appendice membranacea inaequaliter dentata ciliolata; pedicelli articulis similes, sed appendice minore. Spiculae sessiles biflorae, anguste lanceolato-oblongae, 7.5—8.2 mm longae (callo excluso); callus crassus, rotundato-obtusus, basi barbatus. Glumae subaequales, minute punctatae; inferior spiculam aequans, coriacea, marginibus hyalinis, explanata lanceolata, subconvexa, subacuta, 5-nervis, dorso apicem versus parce spinuloso-ciliata, superne bicarnata, carinis angustissime alatis, alis spinuloso-ciliatis; superior inferiore paulo brevior, firme membranacea, marginibus hyalinis apice minute ciliolata, lanceolata, acuta, 3-nervis, superne carinata, carina anguste alata, ala spinuloso-ciliata. Anthoecium inferum ♂: lemma tenuiter hyalinum, lanceolato-ovatum, 6—6.5 mm longum, 2-nerve, minute bidentatum, marginibus apicem versus minute ciliolatum; palea lemmati similis sed angustior et paulo longior; antherae 3 mm longae; lodiculae glabrae. Anthoecium superum ♀: lemma lemmati anthoecii inferi simile sed 3-nerve, apice latius; palea angustior. Spiculae pedicellatae illis sessilibus absimiles, neutrae, ad glumas lemmaque redactae, sine arista 2—2.75 mm longae. Glumae coriaceae, marginibus hyalinis superne ciliolatae, minute punctatae; inferior spiculae aequilonga, lanceolata, 5-nervis, ad carinam superne angustissime alata, ala spinulosociliata, in aristam scabridam 9—12.5 mm longam excurrente; superior inferiore paulo longior, apice integra, obtusa, superne carinata, carina anguste alata, ala spinuloso-ciliata, obscure 5-nervis. Lemma tenuiter hyalinum, parvum.
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  • 91
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.45
    Publication Date: 2015-03-06
    Description: According to general opinion the spikelets of Oryza consist, reckoned from their base upwards, of 2 sterile glumes, called hereafter I and II, one fertile glume (valvula inferior; lemma), called hereafter III, and the palea valvula superior) to this glume, called hereafter p3. The spikelets are placed singly on the very short ultimate branchlets, called hereafter pedicels, of a more or less strongly ramose panicle; the tips of the pedicels are broadened into a shallow infra-spicular cup, either distinctly 2-lobed or not; from the bottom of the cup arises a minute knob, on which the very distinct basal callus of the spikelet is jointed. When ripe, the spikelets of the wild species fall off as a whole, disarticulating at the joint (in dried specimens often long before maturity; hence in herbarium-specimens they are frequently lacking). In many cultivated forms they remain firmly attached to their pedicels, a property of very high economic value. The spikelets are strongly laterally compressed. I and II are either 1-nerved or nerveless; as a rule they are many times shorter than the spikelet, sometimes even very minute. Only in O. Ridleyi they are comparatively well-developed, reaching about half the length of the spikelet, but very narrow. III is very rigid, usually conspicuously granulate, boatshaped, keeled, either awned or not, 5-nerved, with a strong midrib; it has the ultimate lateral nerves along the margins. P3 is likewise boatshaped, shortly cuspidate or not, with a narrow, rather rounded, less often faintly keeled back, 3-nerved; it is about as long as III, awn disregarded, and has the same rigid granulate structure, excepted the narrowly incurved thinly membranaceous smooth marginal parts (hidden by III). It might be taken for a fertile glume, but this view is inadmissible because of the averted position of the lodicules. It has a rather thin mid-nerve and strong lateral nerves, separating the rigid central part from the membranaceous borders. The well-developed lodicules are glabrous; the six stamens are free; there are 2 free shortish styles with large plumose white or violet stigmas which, during anthesis, stick out from the sides of the spikelet in or below its middle. The ripe fruit is oblong or lanceolate, usually angular; it is free from glume and palea but remains firmly incarcerated between them.
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  • 92
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.44
    Publication Date: 2015-03-06
    Description: Dactyloctenium Henrardianum Bor spec. nov. quae ab omnibus aliis speciebus hujus generis inflorescentia racemosa haud digitata satis recedit. An annual grass. Culms slender, 10—30 cm tall, erect, smooth, glabrous, striate in robust specimens, terete, long-exserted from the uppermost leaf-sheath. Leaf-sheaths strongly keeled, loose, slipping from the culm, much shorter than the internode and leaf-blade, markedly striate, smooth and glabrous except for some bristles from bulbous bases sparsely arranged near the margins in the upper fourth; ligule a lacerate membrane not more than 2 mm long. Leaf-blades up to 10 cm long by 5 mm wide at the base, gradually narrowed into a fine point from the rounded base, very scabrid on the margins which also bear long bulbous-based bristles in the lower third; upper surface smooth; lower surface often with bulbous-based bristles; midrib strongly marked with 2—3 prominent parallel veins on either side.
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  • 93
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.90
    Publication Date: 2015-03-06
    Description: The name Arundo Bambos L. Sp. Pl. 81, 1753, is interpreted as properly belonging to the common thorny bamboo of India; therefore this species should be called Bambusa Bambos (L.) Voss. Arundo Bambos L. Sp. Pl. ed. 2, 120, 1762, insofar as it is represented by Linnaeus’ specimen labeled “1. Bambos” and by his description of this specimen, is based on a misidentification of a Chinese species: Bambusa flexuosa Munro (1868). Bambos arundinacea Retz. Obs. Bot. 5:24, 1789, is shown to have been based on the plant known today as Bambusa vulgaris Schrad. ex Wendl. (Coll. Pl. 2:26, pl. 47, 1810), and not on the common thorny bamboo of India, properly called Bambusa Bambos (L.) Voss. Bambusa arundinacea Willd. Sp. Pl. 2:245, 1799, is based on Bambos arundinacea Retz., but Willdenow is shown to have confused, in his text, as in his mind, at least two species under this name: 1. The plant which has since come to be known as Bambusa vulgaris Schrad. (of which he had a specimen labeled “B. arundinacea 1.”) and 2. The common thorny bamboo of India (properly called Bambusa Bambos [L.] Voss) of which he had no specimen. Traditional usage for 150 years has overlooked the facts in this case, and has erroneously applied Bambusa arundinacea Willd., and Bambusa arundinacea Retz. (as Bambos) to the common thorny bamboo of India. As a result of the long-continued misapplication of the name Bambos arundinacea Retz. and its variants, it will be exceedingly difficult to reïnvest the name with its original meaning. It may come to pass that consensus of leadership will be to avoid the use of the name Bambos arundinacea Retz and its variants altogether, at least for some time, because of the risk of being misunderstood, and to continue the use of the name Bambusa vulgaris Schrad., which is generally accepted in its proper sense. Those who use Bambusa arundinacea Retz. (as Bambos) or any of the other variants of the name, may be able to avoid being misunderstood by citing Bambusa vulgaris Schrad. as a synonym. Bambusa Schreb. Gen. Pl. 1:236, 1789, and Bambos Retz. Obs. Bot. 5:24, 1789, are synonymous, and are believed to have been based on the same species, namely the plant commonly known today as Bambusa vulgaris Schrad. Strict adherence to Recommendations IV and V of the fifth edition of the International Rules of Botanical Nomenclature, and probably the claims of priority, would indicate the replacement of Bambusa Schreb. by Bambos Retz. The continuation of the use of the generic name Bambusa Schreb., instead of Bambos Retz., has the sanction of tradition, and of contemporary preference; but in order to be fully justified and stabilized, this usage should be regularized and legalized by action of the International Botanical Congress, placing Bambusa Schreb. on the list of Nomina Conservanda. The genus Leleba Rumph. ex Nakai, Jour. Jap. Bot. 9: 9 et seq. 1933, is added to the recognized synonymy of Bambusa Schreb.
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  • 94
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.22
    Publication Date: 2015-03-06
    Description: On the 13th of October 1940 I found in the vicinity of a wool- and skinwork in Tilburg (The Netherlands, prov. N. Brabant) a sterile grasstuft, striking me by its peculiar habit. I transplanted it into my garden in Dordrecht and there it was flowering for the first time in June 1941, and in July it was collected to be dried. On the 4th of July 1941 I gathered one more fructifying specimen at the same locality in Tilburg. Doubtless the plant was a Deschampsia and my provisory identification was D. media R. et Sch.. Sending the material with this name to Dr P. Jansen in Amsterdam I got his reply: ”Certainly not D. media. It is a species, unknown to me or, more probably, a variety of D. flexuosa“. This conclusion, however, seemed unacceptable to me. The habit of the sterile as well as the fertile plant differs strongly from that of D. flexuosa. The tuft is denser and harder, with thicker and shorter leaves. The panicle is longer, wider and more diffuse, the branchlets less flexuous, the culms are relatively short, as long as the panicle or at most 1½—2 times the length of the panicle (in D. flexuosa 4—5 times). The characteristics of the flower are decisive. The lower glume is 5 mm long, the upper one 6 mm, both of them overtop the lemma and palea of the enclosed flower (in D. flexuosa the glumes are little different in length and equaling or overtopped by the flowers). The stipe of the upper flower, remaining attached to the lower one, when the spikelet falls asunder, is densily pencilshapedly hirsute and 1.5 mm long (in D. flexuosa 0.6—0.8 mm). The upper flower bears a similar stipe of a fully rudimental third flower, in other words: the rachilla is produced behind the upper palea as a hairy bristle. These properties sooner recall D. setacea than D. flexuosa, but the anthers are very small, 0.3—0.5 mm long, on much longer filaments (D. setacea has anthers, 1.5 mm long, filaments 0.5 mm, D. flexuosa: anthers 1.8 mm, filaments very short). All this: the habit, the pale green spikelets without any touch of purple, brown or blue, and the small anthers on long filaments justifies a specific differentiation of the Tilburgian wooladventive. I propose to name it, in honour of Dr J. Th. Henrard, whom I owe so much in the field of adventives in general and of Gramineae in particular: Deschampsia Henrardii nov. spec.
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  • 95
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.120
    Publication Date: 2015-03-06
    Description: A few years ago Prof. Dr W. Martin, at the time director of the Gallery of prints and drawings at Leyden, drew my attention to an oilpainting at Prof. J. N. Bakhuizen van den Brink’s, 40 Rapenburg, Leyden. This painting (size 95 X 68 cm), which is owned by the Leyden University Fund, shows a peculiar group of flowering exotic plants, to which a few mushrooms, a snake, a lizard and some butterflies are added, and on the right side in the back-ground a view on a river or a lake. In the lower right hand corner the painting is signed Lau. Vinn. Prof. Martin concluded from this that it was one of the Haarlem painters Van der Vinne who made it. The most plausible inference seemed to look upon the senior Laurens van der Vinne (1658—1729), a well-known Dutch painter of flowers, as the maker. However, a closer investigation learnt that this was not correct. When Prof. Martin showed me the picture, I got the impression that I had seen a few of the drawings of the individual plants before. Looking through the plate collections of the “Rijksherbarium” it appeared that this impression was right. These collections, namely, contain water-colours of the 4 species of Proteaceae figured in the painting and moreover a water-colour of the specimen of Sprekelia formosissima. All these once belonged to the Leyden professor Adriaan van Royen. The water-colour of Sprekelia formosissima is signed “Laurens van der Vinne Pinxcit 1736”. It is quite probable that this beautiful drawing, together with those of the Proteaceae, were used by Van der Vinne in composing his picture. Besides, it became evident that it was not the senior but the junior Van der Vinne who must be considered the painter, as the former died already in 1729 and the painting must have been made in 1736 or later.
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  • 96
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.1
    Publication Date: 2015-03-06
    Description: Fate has knocked at your door. It has reminded you that, as to the years of your life, you are no longer a young man, that your age will be sixty five on the day this little volume will be presented to you. Time and fate are inexorable powers. Sometimes the question has occurred to me, whether we have any right to speak of a “Jubilee”, whether one’s retirement from office or the attainment of high age is something to be gratulated upon, since these events are usually not exactly welcome to the person involved. Yet, I think there cannot be any doubt as to this. For, can there be ever more reason for deep satisfaction and gratitude than when a man may without self-reproach, look back upon an honest and successful life?
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  • 97
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.113
    Publication Date: 2015-03-06
    Description: As my friend Dr J. Th. Henrard, when young, paid much attention to the adventitious species of Fumaria, I will give here an enumeration of the species found in our country. This genus has been somewhat neglected with us, mainly owing to the fact that the descriptions in our flora’s are not exact, so that the determination was not always easy; the less so as the species are variable in several characters. As I have not much space at my disposal, I will refrain from giving detailed descriptions, but the essential characters I will lay down into the key, so that a correct determination is possible. Minute descriptions are to be found in the splendid works of Mr H. W. Pugsley, which have been a great help to me.
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  • 98
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.42
    Publication Date: 2015-03-06
    Description: Perennis, innovationibus extravaginalibus. Caulis usque ad 80 cm altus, erectus vel nodo infimo radicans et geniculato-adscendens, usque ad apicem paniculae pilosus, pilis albis, usque ad 3 mm longis, e tuberculis emergentibus. Vaginae arcte appressae, internodiis breviores, hispidae, pilis e tuberculis emergentibus, albis, usque ad 4 mm longis, marginibus oris vaginarum stellato-patentibus. Ligula verticilla pilorum consistens. Folia caulina subtus ad basin pilis e tuberculis emergentibus munita, ceterum glabra ut supra; folia infima 2—3 dm longa, complicata vel plana et usque ad 4 mm lata, nervis tenuioribus ac crassioribus alternantibus, folia innovationum omnia angusta, complicata et apicem versus convoluta. Panicula erecta, pyramidalis, per anthesin ac postea patens, usque ad 20 cm longa vel paulo longior; rhachis pilis longis albis patentibus barbatis. Semiverticilla infima e ramis usque ad 8, 6—8 cm longis, composita. Apicem versus numerus et longitudo ramorum sensim decrescunt; hi rami glabri; initium ramificationis secundariae supra partem tertiam infimam; rami secundarii spiculis breviter pedicellatis sparse praediti. Spiculae plumbeo-griseae, lineares, 5—10-florae, quae 7 flores gerunt, 6 mm longae et ½—¾ mm latae. Glumae tenuiter membranaceae; gluma inferior 1 mm longa, acuta; gluma superior 1½ mm longa, obtusiuscula; ambae nervis inconspicius et mox deciduae. Rhachilla glabra, internodiis sublongis, floribus plus minusve remotis. Lemma 1½ mm longa a latere visa linearis, acuta, debilis, margine angusto membranaceo; nervis lateralibus lumine reflecto inconspicuis. Palea elliptica, lemma aequilonga. I found this new species among a series of unicae, bought from K. Dinter and collected by him in 1912 in South-West-Africa (No. 2572, Grassteppe at Okahandja); type specimen in Herb. Lugd.-Bat.
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  • 99
    facet.materialart.
    Unknown
    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.63
    Publication Date: 2015-03-06
    Description: A taxonomic study of the 6 species of Stipa that inhabit desert regions of the Puna de Atacama S. Bomani Haum., S. venusta Phil., S. obtusa [Nees et Mey.] Hitchc., S. rigidiseta [Pilg.] Hitchc., S. saltensis O. Kuntze, and the new species S. Henrardiana) indicates that they constitute a natural group which I designate Obtusae, using as type the species S. obtusa which is the one with priority. The group is characterised by setose leaves, with ligules 3 to 10 mm long, by glumes that are scarious, smooth, depressed and usually unequal, by the fusiform anthoecium with the palea as long as the lemma and by glabrous anthers. These characters reveal a close relationship with Orthachne Nees and Oryzopsis Michx. More detailed studies are necessary to decide the generic relationships. Some of the species studied ( S. Bomani and S. saltensis) contain cyanoglucosides in their vegetative organs and consequently are feared by the inhabitants of the Puna as being toxic to livestock.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
    Format: application/pdf
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    In:  Blumea. Supplement (0373-4293) vol.3 (1946) nr.1 p.6
    Publication Date: 2015-03-06
    Description: 1. (with G. H. H. ZANDVOORT) — Een voor Nederland nieuwe plant, Kentrophyllum lanatum DC. — De Levende Natuur XV, p. 376—380, 4 fig.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
    Format: application/pdf
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